Inhalable Particulate (PM10)

Updated: Quarterly.

National Ambient Air Quality Standard: (24-hour samples; one taken every sixth day) A 24-hour
average of 150 ug/m3 (micrograms per cubic meter) and/or
an annual average of 50 ug/m 3 (micrograms per cubic meter).

Exceedances allowed without a violation being recorded: None.

Disclaimer: Yearly and quarterly data shown below has been subject
to data review and validation procedures by the reporting agency. Monthly
data and data shown graphically is raw, unreviewed and unvalidated data.

The units for all averages in this chart are micrograms per cubic meter.

Year

Number of
Exceedances

Annual
Average

Maximum
24-Hour Average

1993

0

32

130

1994

0

34

96

1995

0

33

115

1996

1

32

166

1997

0

31

120

1998

0

44

139

1999

0

48

107

2000

0

31

81

2001

0

35

91

2002

0

32

65

2003

0

32

66

2004

0

31.5

85

2005

0

31.9

67

2006

0

26.2

76

2007

0

29.1

68

2008

0

31.7

88

2009

0

27.9

79

2010

0

31.6

102

2011

0

33.9

84

2012

0

34.2

109

2013

First Quarter

0

26.6

82

Second Quarter

0

Third Quarter

Inhalable Particulate (PM2.5)

Updated: Quarterly.

National Ambient Air Quality Standard: (24-hour samples; one taken every third day)
A three-year average of the 98th percentile 24-hour averages equal
or greater than 35 ug/m3 (micrograms per cubic meter) and/or
a three-year average of annual averages equal or greater than 15.0
ug/m3 (micrograms per cubic meter).

Exceedances allowed without a violation being recorded: Two percent of daily observations

Disclaimer: Yearly and quarterly data shown below has been subject
to data review and validation procedures by the reporting agency.
Monthly data and data shown graphically is raw, unreviewed and unvalidated
data.

The units for all averages in this chart are micrograms per cubic meter.

Year

First Maximum
24-Hour Average

Second Maximum
24-Hour Average

Annual
Average

1999

30.8

28.9

12.48

2000

31.9

27.5

11.84

2001

35.4

30

12.9

2002

43.1

40.3

13.0

2003

36.8

34.5

11.9

Instrument moved from 10 th and Mitchell Street to Pump Station
site 2nd qt. 2004